particle physics, a glueball is a strongly interacting particle containing no valence quarks. It is composed entirely of gluons. Such a state is possible because gluons carry color chargeand experience the strong interaction. Glueballs are extremely difficult to identify in particle accelerators, because they mix with ordinary mesonstates.
Theoretical calculations show that glueballs should exist at energy ranges accessible with current
collidertechnology. However, due to the mentioned difficulty, they have ( as of 2006) so far not been observed and identified with certainty.
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glueball — /glooh bawl /, n. Physics. a hypothetical object consisting of two or more gluons. Also, gluonium. [GLUE + BALL1] * * * … Universalium
glueball — noun A theoretical particle composed entirely of gluons … Wiktionary
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